| Primary satellite | Secondary satellite |
| Name | deb Chang Zheng 4 | COSMOS 2251 DEB |
| Spacetrack catalog number | 20888 | 34477 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 11:47 | 2024 Dec 23 03:26 |
| Time of closest approach (UTC) | 2024 Dec 24 01:09:25.551 |
| Minimum distance | 1.373 km |
| Height difference | -0.634 km |
| Relative speed | 14.688 km/s |
| Angle between velocity vectors | 160° |
| Geographic position | 66.8°N, 49.7°E |
| Height | 785 km |
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